I have been experiencing random dropped calls for the past 3 weeks or so. There's definitely a pattern here. All calls which have been dropped have been inbound calls and have lasted 3 minutes or less. My ITSP is voip.ms. The problem has occurred with both the toronto2 and atlanta servers. I've had about a dozen dropped calls since the problem started.
Possibly related, I also get the following email from sipxecs about twice a week: The ITSP Account 'voip.ms' disallowed an operation because of Authentication > failure. > Suggested Resolution: Check your ITSP Account domain and password and > restart the SIP Trunking service. Exactly 10 minutes later I get another email saying it has recovered. I've experienced the issue on both ADSL and E10, with both a D-Link DIR-655 router and with pfSense 2.0 RC1 as the firewall. I'm pretty sure I've got my firewall configured correctly, but I'll list my configuration here, just in case. For pfSense, I enabled "Manual Outbound NAT rule generation (AON - Advanced Outbound NAT)" and set static port to true. I've also set up port forwarding for 5060 tcp/udp, 5080 udp, 30000 - 31000 udp. I've made sure that my "trunking gateway configuration has sipxbridge specified as the SBC". I've contacted voip.ms support, but no progress has been made yet. As the next step, I was thinking of running a trace. However, this problem doesn't happen too often, so it will likely need to run for quite a while. Any recommendations on the trace I should run for this problem?
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